scripts/update-linux-headers.sh

   1 #!/bin/sh -e
   2 #
   3 # Update Linux kernel headers QEMU requires from a specified kernel tree.
   4 #
   5 # Copyright (C) 2011 Siemens AG
   6 #
   7 # Authors:
   8 #  Jan Kiszka        <jan.kiszka@siemens.com>
   9 #
  10 # This work is licensed under the terms of the GNU GPL version 2.
  11 # See the COPYING file in the top-level directory.
  12
  13 tmpdir=`mktemp -d`
  14 linux="$1"
  15 output="$2"
  16
  17 if [ -z "$linux" ] || ! [ -d "$linux" ]; then
  18     cat << EOF
  19 usage: update-kernel-headers.sh LINUX_PATH [OUTPUT_PATH]
  20
  21 LINUX_PATH      Linux kernel directory to obtain the headers from
  22 OUTPUT_PATH     output directory, usually the qemu source tree (default: $PWD)
  23 EOF
  24     exit 1
  25 fi
  26
  27 if [ -z "$output" ]; then
  28     output="$PWD"
  29 fi
  30
  31 cp_portable() {
  32     f=$1
  33     to=$2
  34     if
  35         grep '#include' "$f" | grep -v -e 'linux/virtio' \
  36                                      -e 'linux/types' \
  37                                      -e 'stdint' \
  38                                      -e 'linux/if_ether' \
  39                                      -e 'sys/' \
  40                                      > /dev/null
  41     then
  42         echo "Unexpected #include in input file $f".
  43         exit 2
  44     fi
  45
  46     header=$(basename "$f");
  47     sed -e 's/__u\([0-9][0-9]*\)/uint\1_t/g' \
  48         -e 's/__s\([0-9][0-9]*\)/int\1_t/g' \
  49         -e 's/__le\([0-9][0-9]*\)/uint\1_t/g' \
  50         -e 's/__be\([0-9][0-9]*\)/uint\1_t/g' \
  51         -e 's/<linux\/\([^>]*\)>/"standard-headers\/linux\/\1"/' \
  52         -e 's/__bitwise__//' \
  53         -e 's/__attribute__((packed))/QEMU_PACKED/' \
  54         -e 's/__inline__/inline/' \
  55         -e '/sys\/ioctl.h/d' \
  56         "$f" > "$to/$header";
  57 }
  58
  59 # This will pick up non-directories too (eg "Kconfig") but we will
  60 # ignore them in the next loop.
  61 ARCHLIST=$(cd "$linux/arch" && echo *)
  62
  63 for arch in $ARCHLIST; do
  64     # Discard anything which isn't a KVM-supporting architecture
  65     if ! [ -e "$linux/arch/$arch/include/asm/kvm.h" ] &&
  66         ! [ -e "$linux/arch/$arch/include/uapi/asm/kvm.h" ] ; then
  67         continue
  68     fi
  69
  70     # Blacklist architectures which have KVM headers but are actually dead
  71     if [ "$arch" = "ia64" ]; then
  72         continue
  73     fi
  74
  75     make -C "$linux" INSTALL_HDR_PATH="$tmpdir" SRCARCH=$arch headers_install
  76
  77     rm -rf "$output/linux-headers/asm-$arch"
  78     mkdir -p "$output/linux-headers/asm-$arch"
  79     for header in kvm.h kvm_para.h; do
  80         cp "$tmpdir/include/asm/$header" "$output/linux-headers/asm-$arch"
  81     done
  82     if [ $arch = powerpc ]; then
  83         cp "$tmpdir/include/asm/epapr_hcalls.h" "$output/linux-headers/asm-powerpc/"
  84     fi
  85
  86     rm -rf "$output/include/standard-headers/asm-$arch"
  87     mkdir -p "$output/include/standard-headers/asm-$arch"
  88     if [ $arch = s390 ]; then
  89         cp_portable "$tmpdir/include/asm/kvm_virtio.h" "$output/include/standard-headers/asm-s390/"
  90         cp_portable "$tmpdir/include/asm/virtio-ccw.h" "$output/include/standard-headers/asm-s390/"
  91     fi
  92     if [ $arch = x86 ]; then
  93         cp_portable "$tmpdir/include/asm/hyperv.h" "$output/include/standard-headers/asm-x86/"
  94     fi
  95 done
  96
  97 rm -rf "$output/linux-headers/linux"
  98 mkdir -p "$output/linux-headers/linux"
  99 for header in kvm.h kvm_para.h vfio.h vhost.h \
 100               psci.h; do
 101     cp "$tmpdir/include/linux/$header" "$output/linux-headers/linux"
 102 done
 103 rm -rf "$output/linux-headers/asm-generic"
 104 mkdir -p "$output/linux-headers/asm-generic"
 105 for header in kvm_para.h; do
 106     cp "$tmpdir/include/asm-generic/$header" "$output/linux-headers/asm-generic"
 107 done
 108 if [ -L "$linux/source" ]; then
 109     cp "$linux/source/COPYING" "$output/linux-headers"
 110 else
 111     cp "$linux/COPYING" "$output/linux-headers"
 112 fi
 113
 114 cat <<EOF >$output/linux-headers/asm-x86/hyperv.h
 115 #include "standard-headers/asm-x86/hyperv.h"
 116 EOF
 117 cat <<EOF >$output/linux-headers/linux/virtio_config.h
 118 #include "standard-headers/linux/virtio_config.h"
 119 EOF
 120 cat <<EOF >$output/linux-headers/linux/virtio_ring.h
 121 #include "standard-headers/linux/virtio_ring.h"
 122 EOF
 123
 124 rm -rf "$output/include/standard-headers/linux"
 125 mkdir -p "$output/include/standard-headers/linux"
 126 for i in "$tmpdir"/include/linux/*virtio*.h "$tmpdir/include/linux/input.h" \
 127          "$tmpdir/include/linux/pci_regs.h"; do
 128     cp_portable "$i" "$output/include/standard-headers/linux"
 129 done
 130
 131 cat <<EOF >$output/include/standard-headers/linux/types.h
 132 #include <stdint.h>
 133 #include "qemu/compiler.h"
 134 EOF
 135 cat <<EOF >$output/include/standard-headers/linux/if_ether.h
 136 #define ETH_ALEN    6
 137 EOF
 138
 139 rm -rf "$tmpdir"